# 瘦着呢 vs FastingKit

The clearest difference is update cadence: FastingKit at every 3 days against 瘦着呢's every 8 days. FastingKit also leads on device support (4 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. 瘦着呢 sells 3 in-app purchases, starting at $1.99 per month and FastingKit sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

瘦着呢 ships an update every 8 days, FastingKit every 3 days. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 瘦着呢 | FastingKit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 3 days** |
| Size | 7 MB | 22 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [雨 李](https://appshunter.io/developer/1619366507) | [锁利 俱](https://appshunter.io/developer/6779652792) |

## What reviewers say

### 瘦着呢

[App page](https://appshunter.io/ios/app/id6758323337)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 瘦着呢全能版 · 月度 | $1.99 | per month |
| 瘦着呢全能版 · 年度 | $12.99 | per year |
| 瘦着呢全能版 · 月度 | $7.99 | one-time |


### FastingKit

[App page](https://appshunter.io/ios/app/fastingkit-fasting-tracker/id6806566789)

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastingKit Pro（Monthly) | $0.99 | per month |
| FastingKit Pro（Yearly） | $7.99 | per year |
| FastingKit Pro（Lifetime） | $19.99 | one-time |


## Frequently asked questions

### Is 瘦着呢 free?

瘦着呢 is free to download, with in-app purchases available.

### Is FastingKit free?

FastingKit is free to download, with in-app purchases available.

### Do 瘦着呢 or FastingKit have ads?

Neither 瘦着呢 nor FastingKit shows ads.

### Which is updated more often, 瘦着呢 or FastingKit?

瘦着呢 ships an update every 8 days, and FastingKit every 3 days. Most recently, 瘦着呢 was updated on October 7, 2026 and FastingKit on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*